"Dear Prudence: Navigating a Friendship After a Mysterious 'Crash'"

A reader seeks advice on how to handle their best friend's sudden withdrawal after a "crash" following a work trip. The friend is struggling with depression and has cut off communication, leaving the reader feeling worried and hurt. The advice suggests acknowledging the friend's need for space and refraining from expressing their own anxieties, while assuring the friend of their support and readiness to listen when she's ready to reach out.